From: Felipe Balbi <balbi@ti.com>
Date: Fri, 27 Feb 2015 19:21:14 +0000 (-0600)
Subject: usb: musb: cppi41: exit early when tx fifo is empty
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=af63429cf046210d7313805b579dd779d10ad1c0;p=linux-beck.git

usb: musb: cppi41: exit early when tx fifo is empty

as soon as we find out tx fifo is empty, there's
no need to break out of the loop just to have another
branch to complete the transfer. We can just complete
transfer and exit early.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index 73ac9835485d..4407f30d0b86 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -280,19 +280,15 @@ static void cppi41_dma_callback(void *private_data)
 
 		do {
 			empty = musb_is_tx_fifo_empty(hw_ep);
-			if (empty)
-				break;
+			if (empty) {
+				cppi41_trans_done(cppi41_channel);
+				goto out;
+			}
 			wait--;
 			if (!wait)
 				break;
 			udelay(1);
 		} while (1);
-
-		empty = musb_is_tx_fifo_empty(hw_ep);
-		if (empty) {
-			cppi41_trans_done(cppi41_channel);
-			goto out;
-		}
 	}
 	list_add_tail(&cppi41_channel->tx_check,
 			&controller->early_tx_list);